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In D.K.Cheng's Field and wave electromagnetics he states the following:The phasor electric field intensity for a uniform plane wave propagating in the +$z$-direction is $$mathbf{E}(z)=E_0e^{-jkz} $$where ...
Asked on 01/29/2021
2 answerIn the image it can be seen that the anode voltage of a SEM field emission electron gun is up to 30kV.I think that at that voltage an electric...
Asked on 01/29/2021
0 answerThis is the question of the classic image problem in which a point charge $q$ is placed at height $h$ above a grounded plate.Only this time the...
Asked on 01/29/2021 by E2n
1 answeram I right in assuming that if I cross two polarized lights of the same wavelength the result would be destructive interference?I don't mean 90 degrees as in 'orthogonal...
Asked on 01/29/2021 by magnolia1
1 answerFor any movement we need a force. Which force does push the gas coming fast out the bottle of cold coke drink when we open the lid especially for the...
Asked on 01/29/2021
1 answerA child's jigsaw puzzle came with two pairs of cheap cardboard-framed 3D glasses. The glasses had thin plastic film in them, as lenses. These thin flat plastic lenses bend about...
Asked on 01/29/2021 by fadedbee
0 answerI'm trying to prove that the time average of the energy density $omega$ is equivalent to $$langle omega rangle = frac{1}{2}epsilon epsilon_0 |vec{E}_0|^2$$ for a plane EMW. My...
Asked on 01/29/2021
1 answerI don't fully understand the circular polarizer filter (CPL) for my camera. It contains a linear polarizer and a quarter wavelength plate (QWP). The QWP causes a time delay between...
Asked on 01/29/2021 by jkien
1 answerIn Srednicki's QFT Chapter 9, he first computed the vacuum expectation value of the field $varphi(x)$ without including the counterterms in $mathcal L$, then he found that the VEV is...
Asked on 01/29/2021 by Shin-Yue
1 answerFrom this Wikipedia article:Dark matter is a form of matter thought to account for approximately 85% of the matter in the Universe and about a quarter of...
Asked on 01/29/2021
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